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Most Recent Articles
Sugilite Value, Price, and Jewelry Information
What is the color of sugilite? Grape jelly purple is a good description. More popular among consumers in Asia than North America, this is a very rare and beautiful opaque gem material with an unusual appearance.
Pear-Shaped Diamond Guide: Unique & Stylish
Dreaming of a pear-shaped diamond engagement ring? Learn the pros and cons and read our expert advice to find the perfect pear for your style and budget!
Is a D Color Flawless Diamond Worth the Price?
A D color flawless diamond has the highest color and clarity grade — and the biggest price tag. Are these premium diamonds worth the extra money?
Rose Quartz Value, Price, and Jewelry Information
A popular variety of colored quartz, rose quartz makes a durable jewelry stone. Although commonly cabbed and carved, more transparent material can also be faceted.
Gemstone Certificates
Can you rely on gemstone certificates to reveal everything that can affect the value of pricey gems? Learn what to look for when you have a gem certified.
Ruby and Sapphire Survey: Where Do You Draw the Line?
Our survey asked for your input on the age-old question: where is the line between ruby and sapphire? The results may surprise you.
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Sign up for a Pro Membership"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member
